Demi Lovato — PICS

Demi Lovato performs at 102.7 Kiis FM’s Cool For The Summer’ Pool Party at the WaterMarke Tower on July 5, 2015 in Los Angeles, California. (Photo by Michael Buckner/Getty Images)

Demi Lovato performs at 102.7 Kiis FM’s Cool For The Summer’ Pool Party at the WaterMarke Tower on July 5, 2015 in Los Angeles, California. (Photo by Michael Buckner/Getty Images)

Demi Lovato performs at 102.7 Kiis FM’s Cool For The Summer’ Pool Party at the WaterMarke Tower on July 5, 2015 in Los Angeles, California. (Photo by Michael Buckner/Getty Images)

Demi Lovato performs during Demi Lovato’s Debut of her New Single, ‘Cool for the Summer,’ with Z100 at Gansevoort Park Avenue on July 1, 2015 in New York City. (Photo by Ben Gabbe/Getty Images for Gansevoort Hotel Group)

Singer-songwriter Demi Lovato attends Demi Lovato’s Debut of her New Single, ‘Cool for the Summer,’ with Z100 at Gansevoort Park Avenue on July 1, 2015 in New York City. (Photo by Ben Gabbe/Getty Images for Gansevoort Hotel Group)

Demi Lovato shares the cover art for new single ‘Cool In The Summer’ (Courtesy of Demi Lovato)

Demi Lovato is all smiles as she steps out on May 28, 2015 in New York City (FameFlyNet)

Demi Lovato visits the Sirius XM Radio studios on May 28, 2015 in New York City (FameFlyNet)

Demi Lovato shares a cute moment with her dog on March 28, 2015. (Courtesy of Instagram)